Molar Conductivity
The conductivity of a solution divided by the molar concentration of the electrolyte.
Formula / equation
Λm = κ / c
Unit
S·cm²/mol
In depth
Dividing by concentration normalises for the amount of electrolyte, so molar conductivity isolates how effectively each mole of ions carries charge. It rises with dilution — steeply for weak electrolytes, which ionise further, and gently for strong ones, whose ions simply interfere less.
Examples in the real world
KCl rises modestly on dilution, while acetic acid's value climbs by orders of magnitude.